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Building Iot Systems with Openhab Matt Porter Konsulko [email protected] Overview

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Building Iot Systems with Openhab Matt Porter Konsulko Mporter@Konsulko.Com Overview Building IoT systems with openHAB Matt Porter Konsulko [email protected] Overview + Timeline + Frameworks and Protocols + openHAB architecture + openHAB features + openHAB configuration + openHAB examples + Demo Timeline + ARPANET online in 1969 with “things” talking Network Control Program (NCP) + Internet born in 1983: ARPANET “things” start talking TCP/IP + Many Internet connected appliances created from 1990 to present + Kevin Ashton (Auto-ID) coins “IoT” in 1999 + Media goes into a frenzy about IoT that just won’t quit. + openHAB started in 2010 Frameworks + AllJoyn - framework for distributed applications + https://allseenalliance.org/developers/learn/architecture + IOTivity - framework for Machine to Machine(M2M) communication + https://www.iotivity.org/ + Kura - OSGi-based framework for M2M applications + https://eclipse.org/kura/ + Mihini - Lua-based M2M framework + https://eclipse.org/mihini/ + openHAB - Home Automation and IoT gateway framework + http://openhab.org + ... Protocols + CoAP (Constrained Application Protocol) + request/response, low overhead, translates to HTTP + MQTT + pub/sub, low overhead + RESTful HTTP + request/response, one way from devices to service + XMPP (Extensible Messaging and Presence Protocol) + pub/sub, built in authentication + ... MQTT + OASIS standard: MQTT v3.1.1 + Publish/Subscribe and hub/spoke model + MQTT brokers provides the communication hub + Mosquitto 1.3.4 broker supports MQTT v3.1.1 + Fixed header required, variable header and payload optional + Fixed header just 2 bytes openHAB basics + FOSS automation software + http://www.openhab.org + Eclipse Public License 1.0 + Written mostly in Java + Central automation hub + Hardware/protocol agnostic + Many bindings http://www.openhab.org/features-tech.html + Component-based architecture + Each component is an OSGi bundle openHAB architecture + Event bus + Asynchronous communication bus + Repository + Persistent storage + Items + Objects that can be read or written + Have a type and state + Bindings + Translate event bus events to/from external system + Actions + Programmatic methods available for use by scripts/rules openHAB features + Plugin framework + Rules engine + Logging mechanism + UI abstraction + Sitemap - Tree structure of UI widgets + Item UI Providers - Dynamic UI configuration + UI implementations + Web + Android + iOS + Designer tool - graphic configuration of runtime openHAB add-ons + Actions + HTTP - access URL on event + Mail - ancient notification technology + Pushover/Prowl - notifications + Twitter - Tweet that your toilet flushed + Bindings + Bluetooth - device proximity events + GPIO - Linux sysfs-based GPIO events + KNX - home automation events + MQTT - raw protocol support + OneWire - various sensor events + Serial - RS-232 will never die + ZWave - home automation events Running openHAB + Runs well on any x86 or ARM board with 512MB+ RAM + OpenJDK or Oracle JREs are supported + Some bindings may not work on OpenJDK on ARM + Packaged on some distros + Debian Cloudbees repository has the core and all bindings packaged + openhab-runtime + openhab-addon-* + $ cat /etc/apt/sources.list.d/openhab.list deb http://repository-openhab.forge.cloudbees.com/release/1.6.1/apt-repo/ / openHAB configuration $(openhab)/configurations/ openhab.cfg items/*.items persistence/*.persist rules/*.rules scripts/*.script sitemaps/*.sitemap transform/*.map openhab.cfg ######################## Mail Action configuration #################################### Global settings are # in this config file # The SMTP server hostname, e.g. "smtp.gmail.com" mail:hostname=smtp.gmail.com # the SMTP port to use (optional, defaults to 25 (resp. 587 for TLS)) mail:port=587 # the username and password if the SMTP server requires authentication mail:username=torvalds mail:password=linux1991 # The email address to use for sending mails mail:from=Not Really Linus <[email protected]> # set to "true", if TLS should be used for the connection # (optional, defaults to false) mail:tls=true home.items Contact FrontDoor "Front Door [MAP(en.map):%s]" {mqtt="<[openhab: /house/frontdoor:state:default]"} Contact GarageDoor "Garage Door [MAP(en.map):%s]" {zwave="3: command=sensor_binary"} openHAB rules + Java-like + Imports + Variable declarations + Rules var VarType var1 rule “rule name” when <trigger1> or <trigger2> then <execute_actions> end openHAB triggers + Item/Event-based Item <item> received command [<command>] Item <item> changed [from <state>] [to <state>] + Time-based Time is midnight + System-based System started openHAB actions + Actions used in rules engine to accomplish a task + Core actions sendCommand() postUpdate() logInfo() + Binding actions sendMail() pushNotification() sendTweet() sendXbmcNotification() home.rules rule "Notify Front Door" If the state of the door item changes, when send a notification indicating the state Item FrontDoor changed of the door. then pushover("Front door is " + FrontDoor.state.toString) end rule "Notify Garage Door" when Item GarageDoor changed then pushover("Garage door is " + GarageDoor.state.toString) end en.map CLOSED=closed OPEN=open -=unknown A contact item has the state of CLOSED, OPEN, or - (undefined). These are too shouty to print out as is, so transform to lower case before sending to the action. default.sitemap sitemap default label="Home" { Frame label="House" { Text item=FrontDoor } The sitemap defines Items to be displayed in the UI, grouping, and layout. Frame label="Garage" { Text item=GarageDoor } } scripts and persistence + Scripts are another tool useful for reuse of code blocks between rules + Java syntax like Xtend language is used + Persistence allows multiple methods for state to be save + Each Item may specify a persistence strategy + Addons + db4o + mysql + mongodb + Logback ESP8266-based door sensor + $2-3 WiFi SoC module with Tensilica core and GNU toolchain + http://www.esp8266.com + NodeMcu - FOSS firmware with lua interpreter for ESP8266 + http://www.nodemcu.com + Full I/O library including MQTT v3.1.1 client compatible with openHAB + Reed switch interfaced to GPIO on ESP8266 + Just 28 lines of lua + Configure WiFi + Handle GPIO/switch interrupts + Publish MQTT “open”/”closed” messages Door sensor code -- Door switch contact interrupt callback function switchcb(level) if level == 1 then state = "CLOSED" else state = "OPEN" end -- Publish a message on each change in state m:publish(topic, state, 0, 0, function(conn) print("sent") end) end -- Create an MQTT client instance and connect to the broker m = mqtt.Client(clientid, keepalive, username, password) m:connect(broker, port, 0, function(conn) print("connected") end) -- Configure GPIO2 as an interrupt with a pullup gpio.mode(gpio2, gpio.INT, gpio.PULLUP) -- Set GPIO2 to call our handler on both edges gpio.trig(gpio2, "both", switchcb) ZWave Tilt Sensor + Zwave is a proprietary mesh network + Controllers and common sensors have open protocols + Fully supported in openHAB + ZWave products are easy to purchase in U.S. at any home improvement store + Cheap off the shelf sensors + AEON Labs Z-Stick USB controller + http://aeotec.com/z-wave-usb-stick + Push button inclusion of ZWave device to mesh network + Works out of the box with openHAB + EcoLink garage door tilt sensor + Battery powered tilt sensor suitable for overhead doors + Works out of the box with openHAB openHAB future + More bindings, of course + openHAB2 is coming + optimize for embedded (hub with 256MB RAM) + Minimal runtime + Switch to Concierge OSGi? + New binding API incorporate concept of “Things” + “Things” will be discoverable (IP addresses, etc.) + New UI based on material design Q&A References + https://github.com/konsulko/iot-openhab + http://www.openhab.org + https://github.com/openhab/openhab/wiki/MQTT- Binding + https://github.com/openhab/openhab/wiki/Z-Wave- Binding + http://nodemcu.com/ + http://esp8266.com + http://www.openzwave.com/.
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